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<h2 title="Class FiltersPerformance" class="title">Class FiltersPerformance</h2>
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<pre>public class <span class="strong">FiltersPerformance</span>
extends <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">for use in adaptative strategy</div>
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<td class="colFirst"><code>static double[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#FILTER_WEIGHTS_DEFAULT">FILTER_WEIGHTS_DEFAULT</a></strong></code>&nbsp;</td>
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<td class="colOne"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#FiltersPerformance(ar.com.hjg.pngj.ImageInfo)">FiltersPerformance</a></strong>(<a href="../../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo)</code>&nbsp;</td>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#computeAbsFromHistogram()">computeAbsFromHistogram</a></strong>()</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#computeEntropyFromHistogram()">computeEntropyFromHistogram</a></strong>()</code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#computeHistogram(byte[])">computeHistogram</a></strong>(byte[]&nbsp;rowff)</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#computeHistogramForFilter(ar.com.hjg.pngj.FilterType, byte[], byte[])">computeHistogramForFilter</a></strong>(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;filterType,
                         byte[]&nbsp;rowb,
                         byte[]&nbsp;rowbprev)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#getPreferred()">getPreferred</a></strong>()</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#setFilterWeights(double[])">setFilterWeights</a></strong>(double[]&nbsp;weights)</code>
<div class="block">To set manually the filter weights.</div>
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<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#setPreferenceForNone(double)">setPreferenceForNone</a></strong>(double&nbsp;preferenceForNone)</code>
<div class="block">If larger than 1.0, NONE will be more prefered.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#tuneMemory(double)">tuneMemory</a></strong>(double&nbsp;m)</code>
<div class="block">Values greater than 1.0 (towards infinite) increase the memory towards 1.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#updateFromFiltered(ar.com.hjg.pngj.FilterType, byte[], int)">updateFromFiltered</a></strong>(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ftype,
                  byte[]&nbsp;rowff,
                  int&nbsp;rown)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../ar/com/hjg/pngj/pixels/FiltersPerformance.html#updateFromRaw(ar.com.hjg.pngj.FilterType, byte[], byte[], int)">updateFromRaw</a></strong>(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ftype,
             byte[]&nbsp;rowb,
             byte[]&nbsp;rowbprev,
             int&nbsp;rown)</code>
<div class="block">alternative: computes statistic without filtering</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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<h4>FILTER_WEIGHTS_DEFAULT</h4>
<pre>public static final&nbsp;double[] FILTER_WEIGHTS_DEFAULT</pre>
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<pre>public&nbsp;FiltersPerformance(<a href="../../../../../ar/com/hjg/pngj/ImageInfo.html" title="class in ar.com.hjg.pngj">ImageInfo</a>&nbsp;imgInfo)</pre>
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<h4>updateFromFiltered</h4>
<pre>public&nbsp;void&nbsp;updateFromFiltered(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ftype,
                      byte[]&nbsp;rowff,
                      int&nbsp;rown)</pre>
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<h4>updateFromRaw</h4>
<pre>public&nbsp;void&nbsp;updateFromRaw(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;ftype,
                 byte[]&nbsp;rowb,
                 byte[]&nbsp;rowbprev,
                 int&nbsp;rown)</pre>
<div class="block">alternative: computes statistic without filtering</div>
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<h4>getPreferred</h4>
<pre>public&nbsp;<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;getPreferred()</pre>
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<h4>computeHistogramForFilter</h4>
<pre>public final&nbsp;void&nbsp;computeHistogramForFilter(<a href="../../../../../ar/com/hjg/pngj/FilterType.html" title="enum in ar.com.hjg.pngj">FilterType</a>&nbsp;filterType,
                             byte[]&nbsp;rowb,
                             byte[]&nbsp;rowbprev)</pre>
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<h4>computeHistogram</h4>
<pre>public&nbsp;void&nbsp;computeHistogram(byte[]&nbsp;rowff)</pre>
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<h4>computeAbsFromHistogram</h4>
<pre>public&nbsp;double&nbsp;computeAbsFromHistogram()</pre>
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<pre>public final&nbsp;double&nbsp;computeEntropyFromHistogram()</pre>
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<pre>public&nbsp;void&nbsp;setPreferenceForNone(double&nbsp;preferenceForNone)</pre>
<div class="block">If larger than 1.0, NONE will be more prefered. This must be called before init</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>preferenceForNone</code> - around 1.0 (default: 1.0)</dd></dl>
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<pre>public&nbsp;void&nbsp;tuneMemory(double&nbsp;m)</pre>
<div class="block">Values greater than 1.0 (towards infinite) increase the memory towards 1. Values smaller than
 1.0 (towards zero) decreases the memory .</div>
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<pre>public&nbsp;void&nbsp;setFilterWeights(double[]&nbsp;weights)</pre>
<div class="block">To set manually the filter weights. This is not recommended, unless you know what you are
 doing. Setting this ignores preferenceForNone and omits some heuristics</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>weights</code> - Five doubles around 1.0, one for each filter type. Lower is preferered</dd></dl>
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